Cisco has not confirmed specific details about the alleged breach but is conducting an investigation, according to a spokesperson.

A known data leaker, IntelBroker, claims to have breached Cisco and stolen sensitive data, prompting an investigation by the company.

Cisco has acknowledged the breach and is actively investigating the validity of the claims made by IntelBroker regarding unauthorized access to Cisco-related files.

Major corporations allegedly affected by this breach include Verizon, AT&T, Microsoft, Bank of America, and Barclays.

The breach reportedly occurred on October 10, 2024, involving the theft of a significant amount of sensitive information that is now being offered for sale on the dark web.

IntelBroker has released excerpts from the stolen dataset, which include databases, customer information, and screenshots from customer management portals.

The compromised data reportedly includes GitHub and GitLab projects, source code, hard-coded credentials, SSL certificates, and various confidential documents.

IntelBroker claims that the breach was part of a larger scheme that began with data leaks from multiple companies, including T-Mobile and AMD, earlier in June 2024.

The cybersecurity community is closely monitoring the situation, emphasizing the need for robust security measures to protect sensitive corporate data from sophisticated cyber threats.

Despite the claims, the authenticity of the leaked data has not been verified, and the method by which the cybercriminals obtained the data remains unclear.

It is uncertain if this breach is connected to a previous attack in September that targeted Cisco's Magento-based merchandise site.

IntelBroker has a history of high-profile breaches, indicating a persistent threat to major corporations.